Having said that, as an asthmatic I've had the Flu vaccine every year for the last 20 or so years, and knock on wood haven't had Flu since. I also had the multivalent pneumonia vaccine a while ago, so fingers crossed!
My doctor friend doesn't get flu vaccine even when recommended, because, to quote her, "in my line of work, I was already exposed to everything ten times at least". She works as an ORL expert in a big hospital, so she is constantly staring down some sick throats.
Startup idea - vaccine delivery service. Pay a fee or subscription and someone comes to your house or workplace and jabs you with flu vaccine plus any travel shots required.
Not a slight against the flu shot, just a funny tidbit since it reminded me that the vaccine doesn't make me invincible from all similar disease.
"We identified a statistically significant increased risk of noninfluenza respiratory virus infection among TIV recipients (Table 3), including significant increases in the risk of rhinovirus and coxsackie/echovirus infection" [1]
That's one of the complications in assessing efficacy: if the benefit in flu vaccine is potentially quite modest (as determined by some long-running studies [2]), and it causes an increased risk of other noninfluenza respiratory viruses, then we need higher-quality, more detailed studies to understand what's happening.
But based on the discussion of the Cochrane review it seems unlikely. [3]
[1] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3404712/
[2] https://www.cochrane.org/news/featured-review-three-updated-...
[3] https://community.cochrane.org/news/why-have-three-long-runn...